Page 2 of 2

Re: Atari Mega ST Video Output problem

Posted: 17 Mar 2020 11:18
by wietze
Shots from top and bottom pcb and recordings of rgb and mono.

Ive cleaned the board by now, and the angle this is shot looks way worse soldering than it actually is (I reckon :)). I will update picture of underside shifter tonite.
mono.jpeg
board.jpeg

Re: Atari Mega ST Video Output problem

Posted: 17 Mar 2020 14:44
by PhilC
That looks like a sync issue to me

As previously said, download the schematic and trace the tracks from the glue to the shifter etc.

Will ideally need a scope to diagnose.

Re: Atari Mega ST Video Output problem

Posted: 18 Mar 2020 04:47
by ZeroG1972
Seems like my (unresolved) issue :

https://www.exxosforum.co.uk/forum/viewt ... =23&t=2396

Now my screen is always black...

Re: Atari Mega ST Video Output problem

Posted: 18 Mar 2020 10:25
by exxos
Does the monitor work OK on a different machine ?